Distilling appakatus



L, PRAY. DISTILLING APPARATUS.

Patented Jan. 8, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be itknown that I, LYMAN PRAY, of Gharlestown, in the.county of Middlesex, and State of Massachusetts, have invented a new and improved Distilling Apparatus; and I do hereby declare that the following is a full, elear, and exact description thereof, which willenable others skilled in the art to make and use the same, reference being had to the accompanying drawings; forming part of this specification, in which- Figure 1 represents a longitudinal vertical section of this invention.

Figure 2 is a horizontal section of the same, the line x x, fig. 1, indicating the plane of section.

Similar letters of reference indicate like parts.

This invention relates to a still, the fire-chamber or arch of which is provided with two or more shelves, ferming'separate heating-chambers, one abovethe other, each of which connects by a suitable flue with a-smokc stack, said tines being provided with dampers in such a manner that by means of said dampers and shelves the heat-can be confined to the level of the liquid in the still, or, nearly so, and the scorching of the vapors can be avoided without difiiculty. I I

A represents a still, eithenupright orhorizontal, and of. any convenient size and form. In the drawing, an'upright cylindrical stillis shown, which is placed into the fire-chamber ,B, being supportedby aperforated plate, G, through the apertures of "which the heat t'roxn the fire-place, D, passes up. Said fire-chamber is provided with one or more shelves, E, which are arranged at suitable distances apart, and provided with central openings just large enough to admit the still. By those shelves the fire-chamber is divided in. two or more heating-chambers, a b e, which communicate with each other through apertures, 02- which are situated diametrically opposite eaeh other, so that heated gases, after having passed up through one aperture, have to travel round the still in order to reach the opposite aperture From each of the heating chambers a b (1 extends a flue, f g h,to the smoke stack F, and these lines are provided with dampers, f 'g 7r.,'theposition of which can be controlled by suitable handles. If the still is full, the dampers f and g are closed, and the damper h' is opened. The heated gases are thus compelled to pass up through the several heatingohambers ab 0 before they are permitted to escape through the flue h to the smoke stack. As the liquid in the still evaporates, andits level becomes gradually lower and lower, the damper h is closed, and the damper'g is opened, and by these means the heat is confined, as near as possible, to the level of the liquid in the still, and the scorching of the vapors is avoided. In ordinary stills, the heated gases surround the still from'the bottom to the top of the firechamber, and as the level of the'liquid sinks down, the vapors contained in the upper part of the still are superheated, and liable to be scorched; and if the still is used for distilling petroleum, the oil resulting from the distillation assumes a dark color. This difficulty is avoided in my still, in which the heat can easily be confined to a level with the liquid. Itj sebvious that this invention is applicable to horizontal as well as to upright stills, and no further explanation is required to make the arrangement, as applied to a horizontal still, intelligible.

What I' claim as new, and desire to secure by Letters-Patent, is-

The arrangement of one or more shelves, d e, in the fire-chamber B, of a still, to operate in combination with the still A, three fg h, and dampers f g h, substantially as and for the purpose set .forth.

The above specification of my invention'signed by me this 5th day of October, 1866.

LYMAN PRAY;

Witnesses:

WM. F. MCNAMARA, W. HAurr. 

